Perhaps you should try some spelling variations:
thieu khang » chieu khong
thieu quang » hieu quang, thien quan, trien quang
tranh cua » doanh cua, manh cua
cua trong » cua truong, cua trung, qua trong
san chang » ban hang, dan chan, van khang
cong san » cong tac
chang va » hang va, chong va, thang va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu khang) OR (thieu quang)) - canh tranh cua trong cong san chang va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu khang) OR (thieu quang)) - canh tranh cua trong cong san chang va".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu khang) OR (thieu quang)) - canh tranh cua trong cong san chang va*.